<i>Watson</i>

This undated file photo courtesy of IBM shows Watson, powered by IBM POWER7, a work-load optimised system that can answer questions posed in natural language over a nearly unlimited range of knowledge. Watson, named after IBM founder Thomas J. Watson, was built by a team of IBM scientists which rivals a human's ability to answer questions posed in natural language with speed, accuracy and confidence. Watson beat human in a first-ever man vs machine Jeopardy! competition on February 14,15 and 16.Photo: AFP